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Commit 27489a3c authored by Jens Axboe's avatar Jens Axboe
Browse files

blk-mq: turn hctx->run_work into a regular work struct 



We don't need the larger delayed work struct, since we always run it
immediately.

Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent ee63cfa7

block/blk-core.c

+1 −1
Original line number Diff line number Diff line
@@ -288,7 +288,7 @@ void blk_sync_queue(struct request_queue *q) 
		int i;



		queue_for_each_hw_ctx(q, hctx, i) {

			cancel_delayed_work_sync(&hctx->run_work);

			cancel_work_sync(&hctx->run_work);

			cancel_delayed_work_sync(&hctx->delay_work);

		}

	} else {

block/blk-mq.c

+4 −5
Original line number Diff line number Diff line
@@ -936,8 +936,7 @@ void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async) 
		put_cpu();

	}



	kblockd_schedule_delayed_work_on(blk_mq_hctx_next_cpu(hctx),

			&hctx->run_work, 0);

	kblockd_schedule_work_on(blk_mq_hctx_next_cpu(hctx), &hctx->run_work);

}



void blk_mq_run_hw_queues(struct request_queue *q, bool async)
@@ -958,7 +957,7 @@ EXPORT_SYMBOL(blk_mq_run_hw_queues); 


void blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx)

{

	cancel_delayed_work(&hctx->run_work);

	cancel_work(&hctx->run_work);

	cancel_delayed_work(&hctx->delay_work);

	set_bit(BLK_MQ_S_STOPPED, &hctx->state);

}
@@ -1011,7 +1010,7 @@ static void blk_mq_run_work_fn(struct work_struct *work) 
{

	struct blk_mq_hw_ctx *hctx;



	hctx = container_of(work, struct blk_mq_hw_ctx, run_work.work);

	hctx = container_of(work, struct blk_mq_hw_ctx, run_work);



	__blk_mq_run_hw_queue(hctx);

}
@@ -1722,7 +1721,7 @@ static int blk_mq_init_hctx(struct request_queue *q, 
	if (node == NUMA_NO_NODE)

		node = hctx->numa_node = set->numa_node;



	INIT_DELAYED_WORK(&hctx->run_work, blk_mq_run_work_fn);

	INIT_WORK(&hctx->run_work, blk_mq_run_work_fn);

	INIT_DELAYED_WORK(&hctx->delay_work, blk_mq_delay_work_fn);

	spin_lock_init(&hctx->lock);

	INIT_LIST_HEAD(&hctx->dispatch);

include/linux/blk-mq.h

+1 −1
Original line number Diff line number Diff line
@@ -25,7 +25,7 @@ struct blk_mq_hw_ctx { 
	} ____cacheline_aligned_in_smp;



	unsigned long		state;		/* BLK_MQ_S_* flags */

	struct delayed_work	run_work;

	struct work_struct	run_work;

	struct delayed_work	delay_work;

	cpumask_var_t		cpumask;

	int			next_cpu;